The World’s Most Reliable Relay Race

ECG rhythms aren’t random squiggles—they’re the story of an electrical relay race inside the heart. In this episode of Ten Minute Medic, you’ll follow the baton from the SA node to the Purkinje fibers and finally understand why P waves, PR intervals, narrow complexes, wide complexes, and heart blocks look the way they do.

We’ll cover what happens when the runner slows down, drops the baton, takes the scenic route, or starts an entirely separate race—because apparently even cardiac cells can ignore the chain of command. Stop memorizing rhythm strips and start following the electricity.

Cardiac Conduction Review Guide